Method of concentrating ores.



WILLIAM S'IEVENS O1? IMURGCOALENA, NEW lvfEKIGO, ASSIGNOR, BY MESNE ASSXCl-NMENTS. TU TIE-IE DEAR EhtlilLCtIlIltlG AND MINING CUMPANY, OF CLEVELAND, UHIO, it. CUR-FOIHATIUN OHIO,

IttlIlZiiHUTlll {IF (-OITCEllllll-MMFING GEES.

. nfiltrating Specification of Letters lFatent. T at nil; d N 10, 1914 i No Surat/ring. Application filed December 10. 1912. tierial No. 735,93t5l To (ll/I wfmm it may concern tentrate ores by adding oleic acid; or an U Be it known that .l: l l Il I ,14\I t alrnzs'ni' analogousfatty substance, to an orc pulp 'rnvnua, a suh ect ot the lung o't (Kltttl and allot-ting a flotation ot' the sulticl parliritanuan'l arcs1dentot Illagdalcna,countt ticles h the phenomenon of surface ten- 5 oil Socorro and titate of New Mexico, have sion. I

invented a new and uselul lniprotenunt in l have attempted to concentrate certain lllethods of Concentratiiur ti res, of which sultid ores bv the various processes known to the following is a speciticatioin'tli principle inc and have found that no one of them can of the invention heinn herein explained and he successfully employed in the treatment of 10 the best mode in whi h l have contemplated thoae ores. .1 have acertained, by thorough applying that principle. an as to distinguish experiment with the ores referred to, that in it from other itiYQlitltUlS, order to cll'cct a separation of the sulfitl the present invention l'tfltlttfi genemll to particles; by flotation. whether by frothing the cmiccntration of are; to ohtain the (2 luor hr surface tension, it is neccssarv to add 15 able constituents, and its particular design to the pulp sul't'uric acid in order to render in the separation oi" desired inc'talli'terous any oily substance that may be added ctl'ecsultids trout thc associate gangue or from l'lYQ in preferentially adhering" to the sultid other sultid. it an ore containing inetalparticles. lily cxperin'ients, however, have literous gultitls be crushed and mixed with resulted. in the ascertainment that with the 20 'atcr, certain fatty suhstanccs added to sultid ores reterred to the use of olcic acid the mixture will exhihit a peculiar preterenor analogous fatty substances to preferen tial atlinitv for the sultid particles conr, tially adhere to the sulfid particles necessipared with the g'angueparlicles. and seve at tates the consun'iptimi, during the process, processes o'l ore concciura'tion dependent of such a very large quantity of sulfuric 5 upon this peculiarity have been pro loscd. acid that the process hecon'ies impracticable,-

It has hccn proposed to concentrate ores and this is especially true when the ore to be by adding to the ore pulp in water a very concentrated contaminated with carholarge quantity of a suhstauce which will ex; hates which are iasil, attacked by the acid. hihit this pcculiai'it iu the quantity added I hat also ascertained by experiments that 30 being sullicicut to cntrap and tloat upwardly in treating: certain sullid orcs it oleic acid through the water the sullid particles. oanalogous fatty suhstain-c he used it acts h uclua process. however, is not cll'cctivc at upon some oxids. such as the specular oxid all in the concentration of certain ores, and ol iron. equally with the desired sulfid, so moreovm. it is olniour; that in ranch a process that com-entration rcinlered impossible.

3-5 a very large q'uantitg otthc entrappinp suhl have, ascertained by thorough experistancc must he ust'd and it 'louud in pracments that certain aultid ores may be Contice that the quantity is prohihitivc ot the centratcd by a flotation nicthod'hy using, in succosslul workingot' the process. it has cmijlinctioli with sulfuric tlt'ltl. a mineral oil also been proposed to conctaitrate oi'cs by which adheres to the desired sulticl part cles 40 what may he termed a trothinp; process 1 while it will not adhere to the undesired in which sonrc uhstunce cr-rhihit ing; a preterparticlesand by the use of theproccss herein cntial altinit for sultid particle is added to described inarli'ccl separations have hccn the ore pulp, utter which there are n'enci made between the desired sulfide and a atcd in the pulp gaseous huhhlcs that attach gangue inchullng hydrous or anhydrous t5 themselves to the sol lid particles and raise oaida of iron. iron pyritee. or even other unthcm to the surtacc of a containing l'iody of I water (perhaps slightiy acidified) in the the amounts of mineral o1l and acid added form of a troth; hut hoth proposal and practo the pulp are to he determined, within certico in re ard to a 'trothi proccas is to use tain liinits, by experiment. In the treatno oleic acid or :m analogoutattt' ,-:uhstancc I meat of the certain sulfid ores referred to Udhcrcncc the llid oari with a n'iinoral Oil and sulturio acio, thelOS oi pit t1 t .L i. it i h amount at acid necessacv to a, successful conticles tor 1S lul when a s1 ployert ll i ung procc 7- only h hsiance oi t mum-c is cm ccntration 18 less than one-halt the amount I .-i also been po ed to connecc ry it the ore is treated with oleic desired sultids. It is to be understood that 2 miuem 011 and euh such stated 1 1 HQ. eemee oiled While flue ireu eleee not, upun e eubsequ uh gmresezubmetwu; eff the he emriuee u body 01. W u' e v y sueeeesfi Q eeleeeive flotation of ihe eileu zine sulfirl efileeted surface e ueicmn Ueher modes ef epplying the priueipie of my invention u'my be empleyec'i iusvfieeei of one explained, change being mede as r eds; the pmeeee herein rliieeieeed, pew Vida 'he step 0! steps: etmte'ei by any one 01"? the ..uHeWing eieims e2? wiahe equivalent of step er seeps be employed.

1 theuefore particularly peim eue end one timely eleim ee my invention it The precess of eoueeuflzretiug ere, "which 5; in. mixing together m; :1 temperature 01: 110?; less than 60 C. eruehed er euffieieut 1 m a flowing; pulp, numeric eerld, end e, minerei. eifi in emeum; only eufl m; to wefeuemiafiy we; the die eulfid puriiiel es of the ore; ltfueee preeeufiiiug the pulp See the air and; hen W surfeee eiif liquid. be cause e e02 u m: he oiled su1- fid pelt Yes by euiifeee eeueiem eeees 0f cemeueeeting are, which in mixing together m, u eempem tuee of me than 60 crushed ere, sufi'lb. cieue Water he emu a, flowing pulp, e11 mgueum; of sulfuric mid met over five per ceee; ef the me by weight, end e mineral nil in mueuuv'; only su'fiuclent to preferentially eeae file fieeil'ed sulfid particles 01 the eve; end thereafter: pl'eeentmg the [M11 "ore by Weight, and an amount of u petroleum oil of high beiliugpeint not ever one per cent, of the ore by weig'l'st to preferentially eeet the desired eulfid particle-e of the are; and thereafter presenting the uulp to the air and ehen to the surface of u fiquid 130 eauee e flntution of the oiled mam particles by surface teueiox'l.

@iguedi by me, this 19' Pith ciey of October,

WJLL LIAM SYDNEY STEVYDIW}. Mwfiested by--- M. Emu/"Ne. 

